[Bug libstdc++/58638] libstdc++ builds as non-PIC when --with-pic is specified

[fredrik at lysator dot liu.se]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58638

Fredrik Nyström <fredrik at lysator dot liu.se> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |fredrik at lysator dot liu.se

--- Comment #3 from Fredrik Nyström <fredrik at lysator dot liu.se> ---
Seems to be a bug in libstdc++-v3/configure, same in both gcc-4.8 and gcc-4.9.

Suggested fix:

--- libstdc++-v3/configure~     2013-11-22 14:17:55.000000000 +0100
+++ libstdc++-v3/configure      2014-03-03 20:01:32.000000000 +0100
@@ -14909,25 +14909,25 @@
 # libtool variables for C++ shared and position-independent compiles.
 #
 # Use glibcxx_lt_pic_flag to designate the automake variable
 # used to encapsulate the default libtool approach to creating objects
 # with position-independent code. Default: -prefer-pic.
 #
 # Use glibcxx_compiler_shared_flag to designate a compile-time flags for
 # creating shared objects. Default: -D_GLIBCXX_SHARED.
 #
 # Use glibcxx_compiler_pic_flag to designate a compile-time flags for
 # creating position-independent objects. This varies with the target
 # hardware and operating system, but is often: -DPIC -fPIC.
-if test "$enable_shared" = yes; then
+if test "$enable_shared" = yes || test "${with_pic+set}" = set; then
   glibcxx_lt_pic_flag="-prefer-pic"
   glibcxx_compiler_pic_flag="$lt_prog_compiler_pic_CXX"
   glibcxx_compiler_shared_flag="-D_GLIBCXX_SHARED"

 else
   glibcxx_lt_pic_flag=
   glibcxx_compiler_pic_flag=
   glibcxx_compiler_shared_flag=
 fi